Alpha Centauri
 Kedudukan Alpha Centauri A dan Alpha Centauri B
| |
| Ciri-ciri | |
|---|---|
| Alpha Centauri A | |
| Jenis spektrum | G2 V[3][4] |
| U−B indeks warna | +0.23 |
| B−V indeks warna | +0.69 |
| Ciri-ciri | |
| Jenis spektrum | K1 V[3][4] |
| U−B indeks warna | +0.63 |
| B−V indeks warna | +0.90 |
| Alpha Centauri B | |
| Astrometri | |
| Halaju jejarian (Rv) | −21.6 km/s |
| Gerakan wajar (μ) | RA: −3678.19 mas/thn Dec.: 481.84 mas/thn |
| Paralaks (π) | 747.1 ± 1.2 mas[5] |
| Jarak | 4.366 ± 0.007 tc (1.339 ± 0.002 pc) |
| Magnitud mutlak (MV) | 4.38 / 5.71 |
| Perincian | |
| Alpha Centauri A | |
| Jisim | 1.100[6] M☉ |
| Jejari | 1.227[6] R☉ |
| Kekilauan | 1.519[6] L☉ |
| Graviti permukaan (log g) | 4.30[7] cgs |
| Suhu | 5790[6] K |
| Kelogaman | 151%[6] Sun |
| Putaran | 22 days |
| Umur | 6 ± 1 Gyr |
| Alpha Centauri B | |
| Jisim | 0.907[6] M☉ |
| Jejari | 0.865[6] R☉ |
| Kekilauan | 0.500[6] L☉ |
| Graviti permukaan (log g) | 4.37[7] cgs |
| Suhu | 5260[6] K |
| Kelogaman | 160%[6] Sun |
| Putaran | 47 days |
| Penamaan lain | |
Rigil Kentaurus, Rigil Kent, Toliman, Bungula, FK5 538, CP(D)−60°5483, GC 19728, CCDM J14396-6050
α Cen A α1 Centauri, GJ 559 A, HR 5459, HD 128620, GCTP 3309.00, LHS 50, SAO 252838, HIP 71683 α Cen B α2 Centauri, GJ 559 B, HR 5460, HD 128621, LHS 51, HIP 71681 α Cen C (＝ Proxima Cen) LHS 49, HIP 70890 | |
| Rujukan pangkalan data | |
| SIMBAD | data |
| ARICNS | data |
Alpha Centauri (α Centauri, α Cen; juga dikenali sebagai Rigel Kent /ˈraɪdʒəl ˈkɛnt/) merupakan bintang tercerah di selatan buruj Centaurus. Walaupun ia kelihatan pada mata kasar sebagai objek tunggal, Alpha Centauri sebenarnya sistem bintang dedua (dikenali Alpha Centauri AB atau α Cen AB) magnitud visual gabungannya –0.27 menjadikannya bintang tunggal ke-3 tercerah di langit malam selepas –1.46 magnitud Sirius dan –0.72 magnitude Canopus.
Rujukan
[sunting | sunting sumber]- ^ "LHS 50 – High proper-motion Star". Centre de Données astronomiques de Strasbourg. Dicapai pada 2008-06-06.
- ^ "LHS 51 – High proper-motion Star". Centre de Données astronomiques de Strasbourg. Dicapai pada 2008-06-06.
- ^ a b Hoffleit+ (1991). "The Stars of Centaurus". Yale University Observatory. Dicapai pada 2009-03-10.
- ^ a b Datin, Kellie; Dewarf, LE.; Guinan, EF.; Carton, JM. (January, 2009). "FUSE Observations of alpha Centauri B". American Astronomical Society. American Astronomical Society. 213: 200. Bibcode:2009AAS...21340609D. Check date values in:
|date=(bantuan)CS1 maint: multiple names: authors list (link) - ^ Söderhjelm, Staffan (1999), "Visual binary orbits and masses POST HIPPARCOS", Astronomy and Astrophysics, 341: 121–140, Bibcode:1999A&A...341..121S Unknown parameter
|month=ignored (bantuan) See Table 3. - ^ a b c d e f g h i j Kervella, Pierre (March 15, 2003). "A Family Portrait of the Alpha Centauri System". ESO. Diarkibkan daripada yang asal pada 2008-06-16. Dicapai pada 2008-06-06. Unknown parameter
|deadurl=ignored (bantuan); Unknown parameter|coauthors=ignored (|author=suggested) (bantuan) - ^ a b Gilli G.; Israelian G.; Ecuvillon A.; Santos NC.; Mayor M. (2006). "Abundances of Refractory Elements in the Atmospheres of Stars with Extrasolar Planets". Astronomy and Astrophysics. 449 (2): 723–36. arXiv:astro-ph/0512219. doi:10.1051/0004-6361:20053850. Unknown parameter
|libcode=ignored (bantuan)CS1 maint: multiple names: authors list (link)